1. Mansik Jeon

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    1. Mentioned In 37 Articles

    2. 3-Dimensional characterization of cortical bone microdamage following placement of orthodontic microimplants using Optical Coherence Tomography

      Explore Nature Publishing Group
      3-Dimensional characterization of cortical bone microdamage following placement of orthodontic microimplants using Optical Coherence Tomography
      Microimplants are being used extensively in clinical practice to achieve absolute anchorage. Success of microimplant mainly depend on its primary stability onto the cortical bone surface and the associated Microdamage of the cortical bone during insertion procedure leads to many a microimplants to fail and dislodge from the cortical bone leading to its failure. Even though, previous studies showed occurrence of microdamage in the cortical bone, they were mainly 2-dimension ...
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      Mentions: Jeehyun Kim Kyungpook National University Naresh Kumar Ravichandran

    3. Clinical Utility of Intraoperative Tympanomastoidectomy Assessment Using a Surgical Microscope Integrated with an Optical Coherence Tomography

      Explore Nature Publishing Group Otolaryngology
      Clinical Utility of Intraoperative Tympanomastoidectomy Assessment Using a Surgical Microscope Integrated with an Optical Coherence Tomography
      Significant technical and optical advances are required for intraoperative optical coherence tomography (OCT) to be utilized during otological surgeries. Integrating OCT with surgical microscopy makes it possible to evaluate soft tissue in real-time and at a high resolution. Herein, we describe an augmented-reality, intraoperative OCT/microscope system with an extended working distance of 280mm, providing more space for surgical manipulation than conventional techniques. We initially performed ex vivo experiments to ...
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      Mentions: Superlum Ajou University Jeehyun Kim

    4. Non-destructive identification of weld-boundary and porosity formation during laser transmission welding by using optical coherence tomography

      Explore IEEE Xplore NDE/NDT
      Non-destructive identification of weld-boundary and porosity formation during laser transmission welding by using optical coherence tomography
      Laser transmission welding offers significant benefits over conventional welding techniques enabling single-stage rapid plastic joining. The quality of laser transmission welded products are commonly assessed by measuring the weld penetration depth, hardened weld boundary, and inspecting the formation of porosity. However, existing methods of verification are inevitably accompanied by destruction of the specimen. Thus, non-destructive quality assessment methods for laser transmission welding have gained attention recently. Here, we demonstrated an ...
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      Mentions: Jeehyun Kim Kyungpook National University Ruchire Eranga Wijesinghe

    5. Assessment of cortical bone microdamage following insertion of microimplants using optical coherence tomography: a preliminary study

      Explore jzus.zju.edu.cn
      Assessment of cortical bone microdamage following insertion of microimplants using optical coherence tomography: a preliminary study
      Objectives: The study was done to evaluate the efficacy of optical coherence tomography (OCT), to detect and analyze the microdamage occurring around the microimplant immediately following its placement, and to compare the findings with micro-computed tomography (CT) images of the samples to validate the result of the present study. Methods: microimplant s were inserted into bovine bone samples. Images of the samples were obtained using OCT and CT. Visual comparisons ...
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      Mentions: Jeehyun Kim Naresh Kumar Ravichandran Mansik Jeon

    6. Biophotonic approach for the characterization of initial bitter-rot progression on apple specimens using optical coherence tomography assessments

      Explore Nature Publishing Group NDE/NDT , Other Non-Medical
      Biophotonic approach for the characterization of initial bitter-rot progression on apple specimens using optical coherence tomography assessments
      The tremendous advances achieved in the biophotonics technologies have intensified the necessity for non-invasive modalities that can characterize diverse biological materials with increased sensitivity and resolution. Optical coherence tomography (OCT) is one of the techniques that has been applied for biological applications in medicine and agriculture to identify structural properties. Herein, we report the successful incorporation of OCT for the identification of morphological changes that occur as a result of ...
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      Mentions: Jeehyun Kim Kyungpook National University Naresh Kumar Ravichandran

    7. Numerical-Sampling-Functionalized Real-Time Index Regulation for Direct k-Domain Calibration in Spectral Domain Optical Coherence Tomography

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      Numerical-Sampling-Functionalized Real-Time Index Regulation for Direct k-Domain Calibration in Spectral Domain Optical Coherence Tomography
      An index-regulation technique functionalized by numerical sampling for direct calibration of the non-linear wavenumber ( k )-domain to a linear domain in spectral domain optical coherence tomography (SD-OCT) is proposed. The objective of the developed method is to facilitate high-resolution identification of microstructures in biomedical imaging. Subjective optical alignments caused by nonlinear sampling of interferograms in the k -domain tend to hinder depth-dependent signal-to-noise ratios (SNR) and axial resolution in SD-OCT ...
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      Mentions: Jeehyun Kim Changho Lee Kyungpook National University

    8. Non-Destructive Classification of Diversely Stained Capsicum annuum Seed Specimens of Different Cultivars Using Near-Infrared Imaging Based Optical Intensity Detection

      Explore MDPI Open Access Journals Platform NDE/NDT
      Non-Destructive Classification of Diversely Stained Capsicum annuum Seed Specimens of Different Cultivars Using Near-Infrared Imaging Based Optical Intensity Detection
      The non-destructive classification of plant materials using optical inspection techniques has been gaining much recent attention in the field of agriculture research. Among them, a near-infrared (NIR) imaging method called optical coherence tomography (OCT) has become a well-known agricultural inspection tool since the last decade. Here we investigated the non-destructive identification capability of OCT to classify diversely stained (with various staining agents) Capsicum annuum seed specimens of different cultivars. A ...
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      Mentions: Medical University of Vienna Jeehyun Kim Kyungpook National University

    9. In Vivo Vibration Measurement of Middle Ear Structure Using Doppler Optical Coherence Tomography: Preliminary Study

      Explore e-ceo.org Otolaryngology
      In Vivo Vibration Measurement of Middle Ear Structure Using Doppler Optical Coherence Tomography: Preliminary Study
      Objectives Doppler optical coherence tomography (DOCT) is useful for both, the spatially resolved measurement of the tympanic membrane (TM) oscillation and high-resolution imaging. We demonstrated a new technique capable of providing real-time two-dimensional Doppler OCT image of rapidly oscillatory latex mini-drum and in vivo rat TM and ossicles. Methods Using DOCT system, the oscillation of sample was measured at frequency range of 14 kHz at an output of 15 W ...
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      Mentions: Harvard University Massachusetts Eye and Ear Infirmary Ajou University

    10. Multiple Wavelength Optical Coherence Tomography Assessments for Enhanced Ex Vivo Intra-Cochlear Microstructural Visualization

      Explore MDPI Open Access Journals Platform Otolaryngology
      Multiple Wavelength Optical Coherence Tomography Assessments for Enhanced Ex Vivo Intra-Cochlear Microstructural Visualization
      The precise identification of intra-cochlear microstructures is an essential otorhinolaryngological requirement to diagnose the progression of cochlea related diseases. Thus, we demonstrated an experimental procedure to investigate the most optimal wavelength range, which can enhance the visualization of ex vivo intra-cochlear microstructures using multiple wavelengths (i.e., 860 nm, 1060 nm, and 1300 nm) based optical coherence tomography (OCT) systems. The high-resolution tomograms, volumetric, and quantitative evaluations obtained from Basilar ...
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      Mentions: Medical University of Vienna Ajou University Jeehyun Kim

    11. Quality assessment of the optical thin films using line field spectral domain optical coherence tomography

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      Quality assessment of the optical thin films using line field spectral domain optical coherence tomography
      Cross-sectional and three-dimensional images show the effectiveness of the system. In this study, the industrial inspection of optical thin film on touch screen panels was demonstrated using line field spectral domain optical coherence tomography. The conventional Fourier domain optical coherence tomography system requires a single scanner for two-dimensional cross-sectional images and two scanners for volumetric images. Our developed line field spectral domain optical coherence tomography has the advantage of needing ...
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      Mentions: Medical University of Vienna Jeehyun Kim Kyungpook National University

    12. In Vivo Fascicle Bifurcation Imaging of Rat Sciatic Nerve Using Swept-Source Optical Coherence Tomography

      Explore IEEE Xplore Neurology
      In Vivo Fascicle Bifurcation Imaging of Rat Sciatic Nerve Using Swept-Source Optical Coherence Tomography
      The sciatic nerve is the longest and widest single nerve in the human body and is responsible for the signal transduction of the entire hind limb region. Its wide nerve dynamic range and size makes it sensitive to injury. The branching and location of the sciatic nerve are important, and unlike histology, optical coherence tomography (OCT) can provide rapid non-destructive cross-sectional images. The sciatic nerves of ten rats were analyzed ...
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      Mentions: Jeehyun Kim Kyungpook National University Mansik Jeon

    13. Defect inspection of actuator lenses using swept-source optical coherence tomography

      Explore Home - Springer NDE/NDT , Other Non-Medical
      Defect inspection of actuator lenses using swept-source optical coherence tomography
      Actuator lens industries have gained an enormous interest with the enhancement of various latest communication devices, such as mobile phone and notebooks. The quality of the aforementioned devices can be degraded due to the internal defects of actuator lenses. Therefore, in this study, we implemented swept-source optical coherence tomography (SS-OCT) system to inspect defects of actuator lenses. Owing to the high-resolution of the SS-OCT system, defected foreign substances between the ...
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      Mentions: Jeehyun Kim Kyungpook National University Mansik Jeon

    14. In Vivo Non-Destructive Monitoring of Capsicum Annuum Seed Growth with Diverse NaCl Concentrations Using Optical Detection Technique

      Explore MDPI Open Access Journals Platform Other Non-Medical
      In Vivo Non-Destructive Monitoring of Capsicum Annuum Seed Growth with Diverse NaCl Concentrations Using Optical Detection Technique
      We demonstrate that optical coherence tomography (OCT) is a plausible optical tool for in vivo detection of plant seeds and its morphological changes during growth. To investigate the direct impact of salt stress on seed germination, the experiment was conducted using Capsicum annuum seeds that were treated with different molar concentrations of NaCl. To determine the optimal concentration for the seed growth, the seeds were monitored for nine consecutive days ...
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      Mentions: Jeehyun Kim Kyungpook National University Ruchire Eranga Wijesinghe

    15. The Validity of the Diagnosis of Plant Leaf Infections Using Non-Destructive Optical Inspection Technique and Depth-Scan Signal Analysis

      Explore ripublication.com NDE/NDT , Other Non-Medical
      The Validity of the Diagnosis of Plant Leaf Infections Using Non-Destructive Optical Inspection Technique and Depth-Scan Signal Analysis
      The applicability of non-destructive optical imaging technique for the diagnosis of infected leaf materials was investigated along with a depth-scan (amplitude depth profile) signal analysis. The experimented plant leaf specimens were collected from persimmon plantations and the specimens were categorized into three groups: healthy leaf specimens, infected leaf specimens, and apparently healthy leaf specimens collected from infected trees. The non-destructive diagnosis was performed using 840 nm spectral domain optical coherence ...
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      Mentions: Jeehyun Kim Kyungpook National University Ruchire Eranga Wijesinghe

    16. Feature Of The Week 09/17/2017: Non-Destructive Analysis of the Internal Anatomical Structures of Mosquito Specimens Using Optical Coherence Tomography

      Explore Optical Coherence Tomography News NDE/NDT , Other Non-Medical
      Feature Of The Week 09/17/2017: Non-Destructive Analysis of the Internal Anatomical Structures of Mosquito Specimens Using Optical Coherence Tomography
      The study of mosquitoes and analysis of their behavior are of crucial importance in the on-going efforts to control the alarming increase in mosquito-borne diseases. Furthermore, a non-destructive and real-time imaging technique to study the anatomical features of mosquito specimens can greatly aid the study of mosquitoes. In this study, we demonstrate the three-dimensional imaging capabilities of optical coherence tomography (OCT) for structural analysis of Anopheles sinensis mosquitoes. The anatomical ...
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      Mentions: Jeehyun Kim Kyungpook National University Naresh Kumar Ravichandran
    17. 1-15 of 37 1 2 3 »
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  4. About Mansik Jeon

    Mansik Jeon

    Mansik Jeon received his PhD in electronics engineering from Kyungpook National University, Daegu, Republic of Korea, in 2011.Currently, he is an assistant professor of the School of Electronics Engineering at Kyungpook National University. His research interests are in the development of nonionizing and noninvasive novel biomedical imaging techniques, including photo acoustic tomography, optical coherence tomography, ultrasonic imaging, handheld scanners, and their clinical applications.

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